<template>
  <div>
      <!-- 面包屑导航 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片式图 -->
    <el-card>
        <!-- 添加角色按钮区域 -->
        <el-row>
            <el-col>
                <el-button type="primary">添加角色</el-button>
            </el-col>
        </el-row>
        <!-- 角色列表区 -->
        <el-table :data="rolesList" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
                <template slot-scope="scope"> 
                    <el-row v-for="(item1,i1) in scope.row.children" :key="item1.id"
                    :class="['bdbottom',i1===0 ?'bdtop' :'','vcenter']" >
                        <!-- 一级权限 -->
                        <el-col :span="5">
                            <el-tag closable @close='removeRightById(scope.row,item1.id)'>{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <!-- 二级和三级权限 -->
                        <el-col :span="19">
                            <el-row v-for="(item2,i2) in item1.children" :key="item2.id"
                            :class="[i2===0 ?'' : 'bdtop','vcenter']">
                                <!-- 二级权限 -->
                                <el-col :span="6">
                                    <el-tag type="success" closable @close='removeRightById(scope.row,item2.id)'>{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <!-- 三级权限 -->
                                <el-col :span="13">
                                        <el-tag v-for="(item3,i3) in item2.children" :key="item3.id"
                                        :class="[i3===0 ?'' : 'bdtop']"
                                        type="waring" @close="removeRightById(scope.row,item3.id)" closable>{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                </el-col>
                            </el-row>
                        </el-col>
                    </el-row>
                </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column prop="roleName" label="用户名称"></el-table-column>
            <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
            <el-table-column label="操作" width="280px">
                <template slot-scope="scope">
                    <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
                    <el-button type="warning" size="mini" icon="el-icon-setting"
                    @click="showSetRightDialog(scope.row)">分配</el-button>
                    <el-button type="danger"  size="mini" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
                </template>
            </el-table-column>
        </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%" @close="setRightDialogClosed">
        <!-- 树形控件 -->
        <el-tree :data="rightsList" :props="treeProps" show-checkbox
        node-key="id"  default-expand-all :default-checked-keys="defKeys"
        ref="treeRef"></el-tree>
        <!-- 页脚 -->
        <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible=false">取 消</el-button>
        <el-button type="primary" @click="allotRights" >确 定</el-button>
        </span>
    </el-dialog>
    <!-- 修改角色信息对话框 -->
    <el-dialog
        title="修改角色"
        :visible.sync="editRoleDialogVisible"
        width="50%" >
        <el-form :model="roleForm" :rules="roleFormRules" ref="roleFormRef" label-width="100px" >
            <el-form-item label="角色名称">
                <el-input v-model="roleForm.roleName" ></el-input>
            </el-form-item>
            <el-form-item label="角色描述">
                <el-input v-model="roleForm.roleDesc" ></el-input>
            </el-form-item>
        </el-form>
        <!-- 页脚 -->
        <span slot="footer" class="dialog-footer">
        <el-button @click="editRoleDialogVisible=false"  @close='editDialogClosed'>取 消</el-button>
        <el-button type="primary" @click="setRole" >确 定</el-button>
        </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
    data() {
        return {
            //所有角色列表数据
            rolesList:[],
            setRightDialogVisible:false,
            //所有权限列表
            rightsList:[],
            //树形控件属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            //默认选中的节点ID值
            defKeys:[],
            //即将分配权限的ID
            roleId:'',
            //控制修改信息对话框
            editRoleDialogVisible:false,
            //角色信息
            roleForm:{},
            //表单验证规则
            roleFormRules:{
                roleName:[
                    {required:true, message:"请输入角色名",trigger:'blur'}
                ],
            }
        }
    },
    created(){
        this.getRolesList()
    },
    methods: {
        async getRolesList(){
           const {data:res}=await this.$http.get('roles')
           if(res.meta.status!==200) return this.$message.error('获取角色列表失败')
           this.rolesList=res.data
        },
        //根据ID删除权限
        async removeRightById(role,rightId){
           const confirmResult =await this.$confirm('是否删除该标签？','提示',{
                confrimButtonText:'确定',
                cancelButtonText:'取消',
                type:'warning'
            }).catch(err=>err)
            if(confirmResult !=='confirm'){
                return this.$message.info('取消了删除')
            }

           const {data:res}= await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            console.log(res)
            if(res.meta.status!==200){
                return this.$message.error('删除失败')
            }
            this.$message.success('删除成功')
            role.children=res.data
        },
        //展示设置权限对话框
        async showSetRightDialog(role){
            this.roleId=role.id
            const {data:res}=await this.$http.get('rights/tree')
            if(res.meta.status!==200)
            {
                return this.$message.error('获取权限失败')
            }

            this.rightsList=res.data
            //递归获取三级节点ID
            this.getLeafKeys(role,this.defKeys)
            this.setRightDialogVisible=true
        },
        //通过递归获取角色三级权限ID并保存在数组中
        getLeafKeys(node,arr){
            //如果node节点不包含children属性，就是三级节点
            if(!node.children)
            {
                return arr.push(node.id)
            }
            node.children.forEach(item => {
                this.getLeafKeys(item,arr)
            });
        },
        //监听对话框关闭清空tree数组
        setRightDialogClosed(){
            this.defKeys=[]
        },
        //点击为角色分配权限
        async allotRights(){
            const keys=[
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedNodes()
            ]
            const idStr=keys.join(',')
            const {data:res}=await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
            if(res.meta.status!==200)
            {
                return this.$message.error('分配权限失败')
            }
            this.$message.success('分配权限成功')
            this.getRolesList()
            this.setRightDialogVisible=false
        },
        //编辑角色信息
        async showEditDialog(id){
            const {data :res} = await this.$http.get('roles/'+id)
            if(res.meta.status!==200) {return this.$message.error('更新角色信息失败')}
            this.roleForm =res.data
            this.editRoleDialogVisible=true
        },
        editDialogClosed(){
            this.$refs.roleFormRef.resetFields()
        },
        //修改角色信息
        setRole(){
            console.log(this.roleForm)
            this.$refs.roleFormRef.validate(async valid=>{
                if(!valid) return
                //发起修改用户信息请求
                const {data:res}=await this.$http.put('roles/'+this.roleForm.roleId,{
                    roleName:this.roleForm.roleName,roleDesc:this.roleForm.roleDesc
                })
                if(res.meta.status!==200) return this.$message.error('更新失败')
                //关闭对话框
                this.editRoleDialogVisible=false
                //刷洗数据列表
                this.getRolesList()
                //提示修改成功
                this.$message.success('修改成功')
            })
        },
        //根据ID删除角色   
        async removeRoleById(id){
            const confirmResult=await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }).catch(err => err)
            if(confirmResult !=='confirm'){
                return this.$message.info('已经取消删除')
            }
            const {data:res}= await this.$http.delete('roles/'+id)
            if(res.meta.status !==200) return this.$message.error('删除用户失败')
            this.$message.success('删除用户成功')
            this.getRolesList()
        },
    },
}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top:1px solid #eee;
}

.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>